£89 Cheap Flights from Las Vegas (LAS) to Washington (IAD)

View £89 flight on Sat, 10 May 2025Opens in a new window

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Cheap Flights from Las Vegas (LAS) to Washington (IAD)

Prices were available within the past 7 days and start at £89 for one-way flights and £181 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Fri, 9 May - Tue, 13 May
LAS
Las Vegas
IAD
Washington
£181 Return, found 5 days ago
£181
Return
found 5 days ago
Select Alaska Airlines flight, departing Fri, 9 May from Las Vegas to Washington, returning Tue, 13 May, priced at £181 found 5 days ago
Alaska Airlines
Fri, 9 May - Mon, 12 May
LAS
Las Vegas
IAD
Washington
£187 Return, found 5 days ago
£187
Return
found 5 days ago
Select Alaska Airlines flight, departing Fri, 9 May from Las Vegas to Washington, returning Mon, 12 May, priced at £187 found 5 days ago
Alaska Airlines
Wed, 6 Aug - Sun, 10 Aug
LAS
Las Vegas
IAD
Washington
£209 Return, found 5 days ago
£209
Return
found 5 days ago
Select Alaska Airlines flight, departing Wed, 6 Aug from Las Vegas to Washington, returning Sun, 10 Aug, priced at £209 found 5 days ago
Alaska Airlines
Fri, 9 May - Tue, 13 May
LAS
Las Vegas
IAD
Washington
£223 Return, found 5 days ago
£223
Return
found 5 days ago
Select Alaska Airlines flight, departing Fri, 9 May from Las Vegas to Washington, returning Tue, 13 May, priced at £223 found 5 days ago
Alaska Airlines
Sat, 17 May - Wed, 21 May
LAS
Las Vegas
IAD
Washington
£239 Return, found 12 hours ago
£239
Return
found 12 hours ago
Select Alaska Airlines flight, departing Sat, 17 May from Las Vegas to Washington, returning Wed, 21 May, priced at £239 found 12 hours ago
Alaska Airlines
Wed, 6 Aug - Sun, 10 Aug
LAS
Las Vegas
IAD
Washington
£247 Return, found 5 days ago
£247
Return
found 5 days ago
Select Alaska Airlines flight, departing Wed, 6 Aug from Las Vegas to Washington, returning Sun, 10 Aug, priced at £247 found 5 days ago
Alaska Airlines
Thu, 12 Jun - Fri, 20 Jun
LAS
Las Vegas
IAD
Washington
£248 Return, found 6 days ago
£248
Return
found 6 days ago
Select Alaska Airlines flight, departing Thu, 12 Jun from Las Vegas to Washington, returning Fri, 20 Jun, priced at £248 found 6 days ago
Alaska Airlines
Sat, 17 May - Wed, 21 May
LAS
Las Vegas
IAD
Washington
£257 Return, found 12 hours ago
£257
Return
found 12 hours ago
Select Alaska Airlines flight, departing Sat, 17 May from Las Vegas to Washington, returning Wed, 21 May, priced at £257 found 12 hours ago
Alaska Airlines
Sat, 17 May - Wed, 21 May
LAS
Las Vegas
IAD
Washington
£258 Return, found 12 hours ago
£258
Return
found 12 hours ago
Select Alaska Airlines flight, departing Sat, 17 May from Las Vegas to Washington, returning Wed, 21 May, priced at £258 found 12 hours ago
Alaska Airlines
Sat, 10 May - Mon, 19 May
LAS
Las Vegas
IAD
Washington
£261 Return, found 6 days ago
£261
Return
found 6 days ago
Select Alaska Airlines flight, departing Sat, 10 May from Las Vegas to Washington, returning Mon, 19 May, priced at £261 found 6 days ago
Flight from Las Vegas to Washington route information
Origin airport
Harry Reid Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
Alaska Airlines
Return price
£181
Distance
3297 km

Compare flights from Las Vegas to Washington easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Las Vegas to Washington. Operating between them 9 flights per day, 20 airlines cover the route. And Frontier Airlines, Austrian, Brussels Airlines, United Airlines fly direct, getting you to Washington Dulles Intl. in just 10hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Harry Reid Intl. to Washington Dulles Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Harry Reid Intl. (LAS) to Washington Dulles Intl. (IAD) 

The easiest way to view the best deals on flights from Las Vegas to Washington today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Harry Reid Intl. to Washington Dulles Intl. start at just £181 and range up to £261.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Las Vegas and Washington
  • booking your flight during May, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Las Vegas to Washington flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Harry Reid Intl. to Washington Dulles Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Frequently asked questions

How much is a flight from LAS to IAD?
Start packing your bags, because round-trip journeys from LAS to Washington Dulles Intl. Airport (IAD) start from £181. That’s based on fares advertised within the last 7 days on Expedia for flights departing within the next year. Prices can go up quickly, so book now to score the best deal. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Harry Reid Airport (formerly McCarran Airport) to Dulles Intl. Airport?
Most flights can be conveniently cancelled online, but whether or not you are charged a fee varies between airlines. If you do need to cancel your holiday, follow the easy instructions in the Customer Service Portal.
How do I find cheap flights from Harry Reid Airport (formerly McCarran Airport) to IAD that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you’re searching for LAS to Washington Dulles Intl. Airport (IAD) flights, you’ll see a “no change fees” filter for you to select.
How many hours is the flight from Harry Reid Airport (formerly McCarran Airport) to Dulles Intl. Airport?
The average flight time between LAS (LAS) and IAD (IAD) is 8 hours and 1 minute. If you’re travelling with kids, it’s always a good idea to pack some fruit or snacks in your carry-on bag.
How far is the flight from Harry Reid Airport (formerly McCarran Airport) to Dulles Intl. Airport?
Around 3,300 kilometres separates Las Vegas and Chantilly, so pack some entertainment to help you fill in a few hours. That action-packed novel you haven’t finished will do the trick.
Which airlines fly direct from Harry Reid Airport (formerly McCarran Airport) to IAD?
United Airlines (UA) will take you from Harry Reid Airport (formerly McCarran Airport) to Dulles Intl. Airport safely and comfortably. Choose from 60 direct flights each month on this route.
Are LAS to Dulles Intl. Airport flight tickets cheaper when they're purchased at the last minute?
Flight prices are always on the move, so there are no guarantees. While last-minute flight deals between Harry Reid Airport (formerly McCarran Airport) and Dulles Intl. Airport are of course possible, it’s also a good idea to keep a close eye on prices well before you fly. In fact, some airlines publish their prices up to 12 months prior to the departure date. Expedia is continuously updating the biggest bargains around, so keep checking back and be ready to grab your seat when fare prices drop.

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